JPH05260660A - Temporary procedure preforming automatic recovery system - Google Patents

Abstract

PURPOSE:To shorten a recovery time without reducing conventional recovery performance in a power distribution system control system for automatically recovering after a fault section is detected by switch monitoring at the time of a power distribution line fault by installing remote control and fault section detectable switches at positions of the power distribution line. CONSTITUTION:A temporary recovery procedure is formed with a load side of a zone as an object to be recovered based on a fault section value to be input from a telecommunication after a breaker is again opened. After a fault section is detected by switch monitoring after the switch is again reclosed, whether the fault section value inputted from the telecommunication coincides with the fault section detected by the switch monitoring or not is decided. In the case of coincidence, a recovery procedure of formation is immediately executed. In the case of discordance, the recovery procedure is again formed based on the detected fault section, and the procedure is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a provisional procedure pre-created automatic restoration system for shortening automatic restoration time of a distribution line accident in a distribution system control system.

[0002]

2. Description of the Related Art A distribution system control system is a system that installs switches that can be remotely controlled at various points on a distribution line and automates switch operations by remotely controlling from a computer installed at a distribution branch or sales office. .. Based on this, an automatic accident recovery function is added to reduce the power outage time.

The target of automatic accident recovery is usually the case of successful re-closing of a distribution line accident. This will be outlined below with reference to FIG. Figure 3 shows the circuit breaker (C
9B is a diagram illustrating the processing of the distribution system control system according to the timing of turning on / off of B). First, the circuit breaker (C
When B) is cut off, it recognizes a distribution line accident. After that, the SV / TM information by reclosing, reclosing, and reclosing is input, and the distribution system status and the accident information are updated at any time. After a certain time from the reclosing circuit, the remote control switch of the accident distribution line is monitored, the switch that is locked for the Y time period is detected, and the load side of the switch is determined as the accident section. A recovery procedure is automatically created for the power failure section on the load side from this accident section as the target of automatic recovery. Automatically execute the created procedure and complete automatic recovery.

[0004]

In the conventional method, in automatic recovery, it takes a long time to automatically create a procedure, and the recovery may be delayed. Automatic procedure creation is a pure calculation logic called "multi-section multi-stage flexible logic" or "flexible calculation". Follow the power distribution system to find the most suitable form of recovery,
It is expanded to the recovery procedure and output.

First, the number of times data is referred to is large even if the system is traced in only one way, which requires a processing time as compared with normal data processing. An example of this is shown in FIG. The systematic elements and their connections in FIG. 4 correspond to the respective data, and the search is to repeat the data reference [systematic element → connection → ...].

Further, in order to find the optimum flexible mode, a large number of flexible mode combinations are searched. Therefore, the number of repetitions is very large. An example of this is shown in FIG. FIG. 5A shows a processing flow of the sequential evaluation method, in which the evaluation is performed after one search for the flexible mode, and the processing is repeated if it does not reach a certain level. FIG. 5B shows a processing flow of the collective evaluation extraction method. The flexible form is searched as much as possible, and the optimum one is evaluated and extracted. In both the schemes of FIGS. 5A and 5B, a plurality of sets of flexible modes must be found, and therefore the number of repetitions is large.

As described above, the automatic procedure creation is a time-consuming process inevitably, and there is a problem in the current automatic recovery method centered on this.

The present invention has been made in view of the above points, and an object thereof is to provide a provisional procedure pre-creation automatic restoration system capable of realizing reduction of restoration time while maintaining the conventional restoration performance. It is in.

[0009]

DISCLOSURE OF THE INVENTION According to the present invention, a switch capable of detecting a distance control and an accident section is installed at each position of a distribution line, and when a distribution line accident occurs, a circuit breaker is turned on or off, or an accident section value from a teleconverter. Is input at any time to grasp the accident status, and after detecting a fault section by switchgear monitoring after successful reclosing, based on the fault section value input from the teleconverter after the circuit breaker is re-closed in the distribution system control system that performs automatic restoration. A temporary restoration procedure was created with the load side of the relevant section as the restoration target, and after detecting the fault section by switchgear after reclosing again, the fault zone value input from the teleconverter and the switchgear were detected. It is determined whether or not the accident sections match, and if they match, the restoration procedure created above is immediately executed.If they do not match, a restoration procedure is created again based on the detected accident section, and the procedure is executed. It is characterized by rows.

[0010]

Operation: First, a temporary restoration procedure is created based on the accident section value input from the teleconverter before reclosing the circuit breaker after reclosing. Then, after the circuit is closed again, if the accident section of the teleconverter and the switch monitoring coincide, the temporary restoration procedure is immediately executed. For this reason, there is no need to create a restoration procedure after reclosing again as in the conventional case, and the time required for restoration is shortened by the processing time. Moreover, since the logic of procedure creation is the same as the conventional one, the conventional recovery performance can be maintained as it is.

When the value of the accident section does not match the value of the teleconverter and the switch monitoring, the restoration procedure is created again and executed. However, this case is extremely rare, and it is not a problem.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In order to solve the above problems, the present invention adopts the method shown in FIGS. That is, this is a method in which a recovery procedure is created before detecting an accident section and the recovery procedure is executed immediately after the detection of the accident section, thereby shortening the time until the automatic recovery is completed.

First, when the circuit breaker (CB) is re-closed, an accident section value is input from the teleconverter (TC). This is a value obtained by dividing the time from turning on the CB to re-closing it by the X time limit of the switch, which is calculated by the substation equipment and transmitted to the distribution system control system.

This value may deviate from the actual accident section value by about ± 1 due to the variation of the time limit of each switch and the delay of the information input of CB input and re-cutoff. Therefore, at present, the accident section is not determined by the section value, and the recovery procedure is automatically created after confirming the accident section by switchgear monitoring.

In the method of the present invention, when the accident section value from the teleconverter is input, a temporary recovery procedure is automatically created based on the section value. That is, the recovery procedure is created by setting the section corresponding to the section value as the accident section and the load side as the load target power failure section.

After that, when the circuit is reclosed again, the fault section is fixed by monitoring the switch in the same manner as in the current method. However, in the method of the present invention, the decided fault section and the fault section value by the above-mentioned telecon are the same. Determine whether to do.

If they match, the temporary recovery procedure created above is correct, and the procedure is immediately executed as shown in FIG. If they do not match, the temporary recovery procedure created above is discarded because it is not correct, and the recovery procedure is created again based on the confirmed accident section as shown in FIG. 2, and then the procedure is executed.

[0018]

As described above, according to the present invention, a provisional restoration procedure is created before reclosing and the procedure is executed as soon as the accident section is determined after the reclosing. The following excellent effects can be obtained.

(1) The recovery time can be shortened. At present, after reclosing the circuit again, the accident section is confirmed by the switch monitoring, and the procedure is automatically created and executed based on it.
In the present invention, a tentative procedure is created based on the accident section value input from the teleconverter before reclosing again, and the procedure is immediately executed if the accident section of the teleconverter after reclosing and the switch section coincide. is there. This eliminates the need to create a procedure after reclosing again and shortens the time required for restoration as much as the processing time, as compared with the current method. In addition, if the value of the accident section does not match the value of the teleconverter and the switch monitoring, it is necessary to re-create the restoration procedure.

(2) Recovery performance can be maintained. The problem with the current automatic recovery is that it takes time to create the procedure. The reason why it takes time to create a procedure is, as described in the above “Problems to be solved by the invention”, firstly because there are many data references to follow the system, and secondly, the processing that follows the system. This is because it is repeated.
In order to shorten the procedure creation time, it is necessary to solve the above two factors. However, with regard to the former, it is necessary to always follow the system in order to find one flexible form, and there is little room for omission of processing or improvement in efficiency.

Regarding the latter, by limiting the number of flexible modes to be searched, the number of iterations is reduced, and immediately
Processing time is reduced. For example, it is a method of limiting the system range to be searched, and reducing the number of conceivable flexible modes as a result. However, in such a case, the recovery performance will decrease. That is, there is a case where a good interchange form may lie in the system range that has not been searched, and the possibility is cut off. As a result, unrecoverable power failure sections may remain, or the flexibility may not be appropriate for operation.

In the conventional automatic recovery time shortening method, the procedure creation time itself is attempted to be shortened by the means as described above, and in many cases, the recovery performance is lowered in exchange for this. On the other hand, in the present invention, the recovery time is shortened by changing the start timing, and it is not necessary to change the logic for creating the procedure. Therefore, the conventional recovery performance can be maintained as it is.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an automatic recovery method when a teleconverter accident section coincides with an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an automatic restoration method when a teleconverter accident section does not match, showing an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional accident recovery method.

FIG. 4 is an explanatory diagram showing a search for a flexible mode of a distribution system control system.

FIG. 5 shows a process of executing extraction of an optimum flexible mode,
(A) is a flowchart of the sequential evaluation method, and (b) is a flowchart of the collective evaluation extraction method.

Claims (1)

[Claims] Claims: 1.Switches capable of remote control and detection of an accident section are installed in various places on the distribution line, and when the distribution line is in an accident, the breaker ON / OFF and the value of the accident section from the teleconverter are input at any time to detect the accident situation. Grasping, after detecting a fault section by switchgear after succeeding in reclosing again, in the distribution system control system that automatically restores, the load side of the section is restored based on the fault zone value input from the teleconverter after reclosing the circuit breaker. After creating a temporary restoration procedure as a target and detecting the accident section by switchgear after reclosing,
It is determined whether or not the accident section value input from the teleconverter and the accident section detected by the switchgear match, and if they match, the restoration procedure of the above is immediately executed, and if they do not match, the detected accident Preliminary procedure pre-created automatic recovery method characterized by creating a recovery procedure again based on the section and executing the procedure.